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True [87]
3 years ago
12

Given matrix A below, calculate det[A] twice using minors and cofactors

Mathematics
1 answer:
Gala2k [10]3 years ago
5 0

Answer:

a. 3(16-21) - 4(8-18) +5(7-12) = -15 + 40 - 25 = 0

b. 3(21-24) - 5(7-12) + 8(4-6) = -9 + 25 - 16 = 0

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(7x2) x 3
Sindrei [870]
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stiks02 [169]
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4 0
3 years ago
Factor completely 2x2 − 6x − 36.
gavmur [86]
To factor out completely, we should have reached the most simplified form,
first we should take out 2.
2(x2 - 3x - 18)
then we should factor out the inside of the parenthesis,
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And that's the most simplified and factored out form.

The final answer is then the second option, <span>2(x − 6)(x + 3)</span>
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3 years ago
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omeli [17]
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6 0
3 years ago
The seventh grade boys at colonial Christian school removed 1/3 of the 558 chairs in the auditorium how many chairs did they rem
vekshin1
558 * 1/3 = 186
186 chairs
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3 years ago
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